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From an external point P, two tangents are drawn to a circle of radius 8 cm with centre O. If OP = 17 cm, find the length of each tangent. (answer in cm)

Competition practiceGeometry
  • A15
  • B9
  • C12
  • D25

Step-by-Step Solution

The tangent is perpendicular to the radius at the point of contact, so length = √ = √(289 − 64) = √225 = 15.
Answer: A) 15

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